Re: [RFC] : Is /proc/kcore still usefull and/or maintained ?
From: Eric Dumazet
Date: Wed Mar 21 2007 - 19:54:25 EST
I stand corrected : This is a new bug
The /proc/kcore problem appears with linux-2.6.21-rc4-mm1
fd = open("/proc/kcore", 0);
llseek(fd, ...) returns an -EINVAL error
Quick code inspection (before going to sleep...) shows that
proc_reg_llseek() (file fs/proc/inode.c)
is doing something like :
rv = -EINVAL;
llseek = pde->proc_fops->llseek;
spin_unlock(&pde->pde_unload_lock);
if (llseek)
rv = llseek(file, offset, whence);
As kcore dont have a .llseek handler, proc_reg_llseek() returns -EINVAL;
Previous kernel was probably calling a default llseek() handler.
if (!llseek)
llseek = default_llseek;
Hum ???
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